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6.3 Interpreting and interacting with earth systems

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Question 22

Weather balloons launched over Antarctica collect air samples. Scientists use the samples to estimate the annual mean concentration of carbon dioxide in the atmosphere.

YearCarbon dioxide concentration (ppm)
2000370
2024424

A forecast assumes that the mean annual increase between 2000 and 2024 continues unchanged.

What concentration does the forecast give for 2040?

[1]
A

460 ppm

B

478 ppm

C

406 ppm

D

388 ppm

Markscheme

6.3 Interpreting and interacting with earth systems Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

109 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.

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